"I understand and deserve the feelings of anger and disappointment among my friends and family. There are no excuses and I take full responsibility for the hurt I have caused. I have apologized to Maria [Shriver], my children and my family. I am truly sorry," he said in an official statement on Tuesday.

TMZ has now obtained photos of a boy purported to be Schwarzenegger's son and the woman alleged to be the child's mother, Mildred Patricia Baena. In the images, the boy's face has been blurred because he is underage.

An insider told the website that Baena began to "pursue Arnold" more than a decade ago and didn't initially inform the Austrian actor that he was the father of her son after becoming pregnant.

After eventually revealing the truth to Schwarzenegger following the boy's birth, the Terminator star began to provide "generous" support for the child, the source insisted.

Since retiring from the Schwarzenegger household in January, it is thought that Baena currently lives with her and Arnold's now-teenage son, as well as her three other kids, a few hours outside of Los Angeles.

Schwarzenegger has not yet commented on the validity of the website's claims.